18975724800 has 108 divisors (see below), whose sum is σ = 62623908480. Its totient is φ = 5060188160.

The previous prime is 18975724787. The next prime is 18975724811. The reversal of 18975724800 is 842757981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 474960 + ... + 513359.

Almost surely, 2^18975724800 is an apocalyptic number.

18975724800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18975724800 is an abundant number, since it is smaller than the sum of its proper divisors (43648183680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18975724800 is an equidigital number, since it uses as much as digits as its factorization.

18975724800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988348 (or 988329 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 51.

The spelling of 18975724800 in words is "eighteen billion, nine hundred seventy-five million, seven hundred twenty-four thousand, eight hundred".